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AST-CAN485 Dev Board & Shields

Co-developed with Atlantis Specialist Technologies, the AST-CAN485 Dev Board possesses an onboard CAN (Control Area Network) and RS485 ports, enabling quick and easy interfacing to a multitude of industrial devices.

What CAN you do with the CAN485?

If you’ve gotten the basics of Arduino under your belt but have bigger and more demanding projects to tackle, the SparkFun's CAN485 system could be just the thing you need.

Utilizing an Atmel AT90CAN128 processor with an onboard CAN controller, a CAN bus transceiver plus an RS485 transceiver, the CAN485 board brings automotive and industrial applications within reach of those with just basic programming skills.

SparkFun AST-CAN485 Dev Board

SparkFun AST-CAN485 Dev Board

View the hookup guide
SparkFun AST-CAN485 WiFi Shield

SparkFun AST-CAN485 WiFi Shield

View the hookup guide
SparkFun AST-CAN485 I/O Shield (24V)

SparkFun AST-CAN485 I/O Shield (24V)

View the hookup guide


CAN (Controller Area Network) bus is used in all modern vehicles as an electrically resilient, hostless network between numerous subsystems. The CAN485 board comes with an onboard CAN controller and transceiver, giving you low-level access to those subsystems.

Industrial Technology

With the addition of the forthcoming 24V IO shield for the CAN485 board, as well as the two industrial-grade com standards of CAN and RS485, the CAN485 board lends itself to a host of industrial applications with the simplicity of Arduino programmability.


RS485 is a common network standard used in industrial applications, giving very good noise immunity, capable of 1200-meter runs and data rates up to 10Mb/s. The CAN485 board comes with an onboard RS485 transceiver, allowing simple integration into your projects where electrical noise becomes a limiting factor.


With the addition of the WiFi shield, the CAN485 board gives you wireless access from anywhere in the world to wired industrial and automotive networks where noise is problematic.

Two powerful technologies working together

CAN bus

  • Primary use cases are in automotive applications, but can be in many applications requiring a simple, multipoint two-wire bus with good noise immunity
  • Operates without a host/master, up to 40 meters
  • High speed CAN up to 1Mb/s, linear bus terminated at either end with 120 ohm resistors
  • Low speed (“fault tolerant”) 125Kb/s, star configuration, terminated at each device with a fraction of the overall termination resistance (total not less than 100 ohms)
  • Message-based, all messages prioritized
  • Two-wire differential interface, 0–5V, highly resistant to electrical noise
  • All devices connect to the same two-wire bus, making the network very simple to maintain


  • Up to 10Mb/s, up to 1200 meters
  • Point to point, or multipoint, in a linear topology
  • Two-wire differential (GND optional), generally asynchronous serial
  • Spec only specifies electrical interface, not com protocol
  • 0 to 5V operation, allowed common mode voltage WRT GND = -7V to 12V
  • Ideal for longer-distance networking with good noise immunity

Helpful products to use with the AST-CAN485 Dev Board

SparkFun OpenLog

SparkFun OpenLog

SparkFun FTDI Basic Breakout - 5V

SparkFun FTDI Basic Breakout - 5V

SparkFun Serial Basic Breakout - CH340C and USB-C

SparkFun Serial Basic Breakout - CH340C and USB-C

Break Away Headers - Straight

Break Away Headers - Straight

Break Away Male Headers - Right Angle

Break Away Male Headers - Right Angle

Photon Stackable Header - 12 Pin

Photon Stackable Header - 12 Pin

SparkFun Mini GPS Shield

SparkFun Mini GPS Shield

ProtoShield for Arduino Pro Mini

ProtoShield for Arduino Pro Mini